Proportion question

Can someone please help, I don't know why but this question is giving me trouble-I am having a mental block. Thanks.

The distance that one professional golfer can drive a golf ball has a normal distribution with a mean of 258 yards and a standard deviation of 6 yards.

What proportion of his drives exceed 280 yards in length?

How many yards should this golfer drive a ball so that the distance is among his longest 25%?


Ambassador to the humans
Are you able to answer a question like... what proportion of observations from a standard normal distribution N(0,1) will fall above the value 1.96?

Could you transform the problem you have into one dealing with the standard normal distribution?