I see your new changes are in effect on your site. They look like they are set to 240.
With X-cart 5 you should never directly edit a file, or it will break future upgrades of the site. None of the default files should ever be changed, or your changes will be overwritten when you upgrade. Rather, you make all the changes in your custom created module, or in the provided module called Custom skin. The custom skin module is what I used above.
I just made a video about using the custom skin that might help you to better understand how it is used:
http://youtu.be/LxpUCoYU_nU