given the mean and standard deviation in normal distribution how to find the probability

Question

the heights of the girls of 14 students ,their heights are measured , in a large school are normally distributed with mean 155 cm and standard deviation 12 cm.find the probability that a girl is taller than 170 cm.

Answer 1

155+12=167=upper bound av the 1 sigma

so 170 is a littel inside the 2-sigma area

1 sigma inklude bout 63%, so the probability is < 37%

yu need tu find sumwon hu liv/breth/sleep probalibity tu giv anser akkurut tu 10 desimals  (with 93% chans hez rite)

Answer 2

There is a 0.1253 probability that a best-of-seven contest will last four games, a 0.1711 probability that it will last five games, a 0.2483 probability that it will last six games, and a 0.4553 probability that it will last seven games. Verify that this is a probaility distribution. Find it mean and standard deviation. Is it unusal for a team to "sweep"by winning in four games?