Position one element over the other

.lista-cartoneira h1 {
    font-size: 1.2rem;
    margin: 12px 0 12px 0;
    font-weight: 500;
}

.lista-cartoneira h2 {
    font-size: 1rem;
    margin: 12px 0 12px 0;
}

.lista-cartoneira img {
    width: 80px;
    height: 80px;
    max-width: 80px;
    margin: 12px;
}

.card-panel {
    padding: 0 !important;
}

.col.s9.lista-cartoneira {
    width: 75%;
    margin-left: 12px;
}

.botoes-cartoneira.row {
    height: 56px; 
    margin: 24px 0 24px 0;
}

.botoes-cartoneira.col {
    height: 56px; 
    text-align: center;
}

.atalhos-cartoneira.col i {
    margin-top: 43px;
}

.atalhos-cartoneira.col {
    height: 110px; text-align: center; color: white;
}

.item-total {
    width: 200%;
}

@media only screen and (min-width: 340px) {
    .col.s9.lista-cartoneira {
        width: 75%;
        margin-left: 0;
    }
}

@media only screen and (min-width: 600px) {
    .col.s9.lista-cartoneira {
        width: 220%;
        margin-left: 0;
    }
    .lista-cartoneira h1 {
        font-size: 1.8rem;
    }
    .lista-cartoneira h2 {
        font-size: 1.6rem;
    }
}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><divstyle="width: 100%; overflow-x: hidden;">
                <div class="item-total">
                    <div class="col s12 m8 offset-m2 l6 offset-l3" style="width: 50%;">
                        <div class="card-panel grey lighten-5 z-depth-1">
                            <div class="row valign-wrapper">
                                <div class="col s3 lista-cartoneira" style="padding-left: 0px;">
                                    <img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQrSKKu7oCCmPKDSTU6aSsZMfnUxrVImzv42-DDnAgVBmG54Szz"alt="" class="circle responsive-img">  
                                </div>
                                <div class="col s9 lista-cartoneira">
                                    <h1>ABC</h1>
                                    <h2>DEF</h2>
                                </div>
                            </div>
                        </div>
                    </div>
            </div>
            
            <div class="col s12 m8 offset-m2 l6 offset-l3" style="width: 50%; float: right; margin-top: -136px;">
                    <div class="card-panel grey lighten-5 z-depth-1">
                        <div class="row valign-wrapper botoes">
                            <div class="atalhos-cartoneira col s3" style="background-color: #00b0ff;">
                                <i class="material-icons">phone</i>
                            </div>
                            <div class="atalhos-cartoneira col s3" style="background-color: #ffb74d;">
                                <i class="material-icons">email</i>
                            </div>
                            <div class="atalhos-cartoneira col s3" style="background-color: #757575;">
                                <i class="material-icons">place</i>
                            </div>
                             <div class="atalhos-cartoneira col s3" style="background-color: #00BFA5;">
                                <i class="material-icons">open_in_new</i>
                            </div>
                        </div>
                    </div>
                </div> 
            </div>
            
            <script type="text/javascript">
                $('.botoes').hide();
                // DESLIZA 
                var inicialX;
                addEventListener('touchstart', function(e) {
                    var toqueobj = e.changedTouches[0];
                    inicialX = toqueobj.pageX;
                }, false);
                //
                addEventListener('touchmove', function(e){
                    e.preventDefault();
                }, false)
                //
                addEventListener('touchend', function(e){
                    var toqueobj = e.changedTouches[0];
                    var distancia = toqueobj.pageX - inicialX;
                    if(distancia < 0){
                        $('.botoes').show(100);
                        $('.botoes').css('position', 'relative');
                    }
                    if(distancia > 0){
                       $('.botoes').hide(100);

                    }
                }, false)
            </script>
        </div>
    </div>