On the left of your post on here, it shows your name, avatar, date joined, location, and ends with the number of Rep Power.
I just gave you Reps but don't know if they count yet since I am fairly new. Now look at the very top right of this page and it says Settings ( next to log out). Click Settings and it will list the posts and forums you subscribed to, and under that it says Reputation points. However there is no way to know who gave the reps. It appears not many ever use that feature here but instead post a reply to their posts.