First, the word 'ribbon' has no meaning in Zencart, so it's hard to see where you want the Sales Message to end up. If you want it below the header, it might be better to remove it completely and include your custom message by editing define_main_page.php in Admin - Tools - Define Pages Editor.

The Sales Message (also known as the tagline) is text and can be changed following this tutorial:

https://www.zen-cart.com/tutorials/i...hp?article=127