The minimum scores for ACT are 18 for Reading Section, 17 for English Section, and 19 for Math Section. The SAT is usually taken in the early fall (October or November) of the senior year. A number of juniors take the test in the late spring (May or June) and take it again in the senior year.
An IQ score of 115 means performance one standard deviation above the median, a score of 85 performance one standard deviation below the median, and so on. Lewis Terman and other early developers of IQ tests noticed that most child IQ scores come out to approximately the same number by either procedure.
An IQ score of 117 is considered to be in the high average range of intelligence. It is approximately the same as a percentile score of 87 (the 87th percentile). That means (sorta) that if you placed 100 people in a row your score was higher than 87 other peoples score and 13 people scored higher than you.