Thanks for writing in! Only our Pro theme comes with header builder which you can customize your headers. If you want to build similar layout using X theme, you can try utilizing Topbar (Theme Options > Header > Topbar) for the menu (you can add HTML into your Topbar).
Then you will need some customization skills to replace navigation menu with the content. Custom development is outside the scope of the support that we provide. However to point you to the right direction, _navbar.php file is located under (x/framework/legacy/cranium/headers/views/global/). You can setup a child theme and copy the file into your child theme's respective location and overwrite it with your own customization.