Internet-based IQ tests are not reliable at all. I've gotten scores from the few I took online coming in around 135-160 at different times. Totally off the wall, IMNSHO.
100 is supposed to be average, standard deviation is generally about 15.
Anything below 80 and the general public is going to be rolling their eyes at you behind your back... oddly enough, the same thing happens when you are over 140ish.