You can edit the style.css file by making content float right as below code:
.sidebar .site-content {
display: block;
float: right;
width: 75%;
}
@ronnettecox: Thank you contributing to the forums but please do not encourage people to edit theme files directly. At best, they will lose all of their changes when they update the theme. At worst, they could bring their site down. They should be recommended to create a child theme or use a custom CSS plugin for their changes.
@pietro.falcone: Do not edit the theme itself. First create a child theme for your changes. Or install a custom CSS plugin.
My apologies, yes I used a child theme when I edited the above code.
