How do you say how are you in native American?

It depends what Native American language you want to say "hi" in!

I can answer one - Lakota Sioux language.

Men say "hau" ( pronounced howh). A woman would respond to that by saying "han" which means "yes".

Women don't really say hello, they would more likely greet you by saying their relationship name to you eg- cousin!, sister, aunt etc.