@flyingbird please use these css rules into your custom css section or add to the style.css than we’ll see the action:

.header-right .site-logo {
display: none;
}

.header-right .img-logo {
background: url(“/fullurlyourrightlogourlhere/logo-right.png”) repeat scroll 0 0 rgba(0, 0, 0, 0);
display: inline-block;
height: 60px;
margin-right: 0;
width: 200px;
}