IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ score less than 85, to the nearest tenth?

I don’t understand but try looking it ups somewhere else more reliable so you get an answer easier and faster than having to wait SO LONG for an answer on here I hoped I helped somewhat, I apologize deeply if I didn’t I’m not sure for this question tho so I advise to look it up or sum <333 ok