Help please. Its due tomorrow

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Anyone know? will mark brainliest if correct!

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .