You can add below code to your child theme.

@media screen and (min-width: 59.6875em) { .site-content { float: left; margin-left: 0px; width: 70.5882%; }

.sidebar {
    float: right;
    right:0;
    margin-right: 0px;
    max-width: 413px;
    width: 29.4118%;
}
 
body:before {
    right: 0;
    left:auto;
}
 
.site-footer {
    margin: 0 0 0 6.1%;
}

}

You can add below code to your child theme.

@media screen and (min-width: 59.6875em) {
    .site-content {
        float: left;
        margin-left: 0px;
        width: 70.5882%;
    }   
    .sidebar {
        float: right;
        right:0;
        margin-right: 0px;
        max-width: 413px;
        width: 29.4118%;
    }   
    body:before {
        right: 0;
        left:auto;
    }       
    .site-footer {
        margin: 0 0 0 6.1%;
    }
}