How to Restore from iCloud Backup?

Restoring from iCloud backup: I downloaded iTunes, synched my iPhone 4s, and don't see any email, contacts, calendar items, photos, videos, or text messages. The screen does say the last backup to iCloud was minutes ago, but I have no idea how to check iCloud to make sure all my stuff is there before I restore my iPhone. (I need to restore the iPhone because it's having problems and Apple told me to do that through iTunes.) Apple told me I'd see everything in iTunes and could copy the stuff over once the restore is complete, but I just don't see anything in iTunes. What am I missing? Please help.