To get it to float to the right you can add this code to your css –
.menu-secondary .menu-item {
float: right;
}
That will get the menu items to float to the right. Since it is CSS, the way it works is the first item will float to the right first. Which means every other item/link behind it will float as well. So you’ll need to reverse the order in you menu so it will show up in the correct order on your site.