I’d say you’re probably right in the middle of the pack. Your GPA/courses seem pretty solid. Your test scores are pretty good, but not great, either. Your ECs are pretty average (which means excellent for most schools, but for top-tier schools like NU, I wouldn’t say they stand out from the crowd). The recs and essays are what will make you stand out or just get tossed aside. I hate giving percentage rates (so I won’t), but I will say that I don’t think admission for you is a sure thing (though I don’t think it’s out of the question, either).
Best of luck! Go 'Cats!