Hello. I just recently replaced strings on my fender american deluxe strat and I've noticed the bridge is up a bit, but it was like that when i got it. Do I need to adjust it at all? here are some pics and how do I go about that. thanks!

Its set up to float, you can push and pull on the whammy bar. Try it out.
I was watching some videos on youtube on how to set up a floating fender trem. Looks just like the ones on the video. Jump on there and check it out.
Completely normal. You can pull it flat the the top if you want a more solid bridge with a dive only trem setup. Floating it let's you get a better range of effect with the tremolo.