The average IQ score is 100 so anything above that is considered good. Bear in mind though that some of these online tests do not give an accurate reflection of your true IQ score.
As above it's above average but not quite smart enough to be in Mensa. In Brave new world by A. Huxley she'd be a Beta, brighter than a delta etc but not as bright as an Alpha!
it's very good for your age. as you have seen - 100 is average. i scored 135 on home test some years ago - went to mensa supervised test an UEA in norwich and scored 149 .. i joined mensa.
you have a good logical mind, make the most of it - especially ion school - and have a succesful rewarding carrer when you leave.