Yes, that is quite good, in the top 5th percentile of human intelligence (meaning only 5 percent of people have this level of intelligence). Most people score around 100 points (this is the average score, about 70% of the population). Anything above that is considered above average intelligence, while anything below 70 points usually indicates some form of retardation. I think anything above 140 puts you into the genius level.
When you start to learn about statistics in the higher grades you will understand more about how IQ tests work, they usually use the IQ test results as a example to explain how statistics work.