How much of a factor does cl rank play in college admissions?

I am a junior and we found out our cl rank recently. I am 9th out of about 135 students. This only takes our 9th and 10th grade grades into account so if I can keep it up this year i should be able to move up to at least 7th. Anyways I really want to go to a good school; like Cornell or Dartmouth, and although I am in the top ten percent I'm worried that they will reject me because of my stance. I'm really upset about this whole thing, as everyone at school was asking me over and over again if I was valedictorian. I just didn't feel like telling anyone my rank.