Read the question again carefully. It is helpful to sketch a normal graph in problem like this.
One fact you should know is that the cumulative area under the entire normal curve is 1. So if the area to the left of a certain z score is 0.4, what is the area to the right of it? (Remember they should add up to 1).
Note: The cumulative area is 0.4 does not mean the z score is 0.4.