I thought that the daily maximum reputation was 200, right?
But today I got 205. How is that possible?
The reputation from upvotes is capped at 200. However, some things aren't capped, namely:
I see in your case someone selected your answer, thus you got a bonus 15 points. So you could actually get 10 more points still.
To add to Pearson's excellent theoretical answer, you can see specifically where you got the rep in 2 ways:
Your reputation tab on user page:
https://scifi.stackexchange.com/users/19374/shevliaskovic?tab=reputation
Note the green square around the last line's rep (15) - that "+15 accept" is what caused you to get 205. Green background indicates that this rep doesn't get capped.