Looking at my reputation, I noticed that I received two points for a question that has not been asked by me, and to which I didn't answer. The only thing I did was to suggest an edit, and that edit has been approved.
Is it normal?
The suggested edit feature is fairly new.
From the FAQ:
The other way to gain reputation is by suggesting edits to existing posts as a new registered user. Each edit will be peer reviewed, and if it is accepted, you will earn +2 reputation. You can only earn a maximum of +1000 total reputation through suggested edits, however.
There is also a detailed MSO answer about suggested edits.