Wikipedia says
A superhero or superheroine is a stock character that typically possesses superpowers, abilities beyond those of ordinary people, and fits the role of the hero, typically using their powers to help the world become a better place, or dedicating themselves to protecting the public and fighting crime.
So yes, he is definitely dedicated to protecting the public, but it feels wrong to call him a super hero. What do you think?
I mean, he doesn’t follow the trappings of a comic book super hero (don’t @ me about Star Wars comics). He has all the powers and motivations of a super hero though. At the end of the day, Iron Man is just a rich guy, what makes him a super hero is the framing of his media.