87.7% of the standard normal curve lies to the left of z. (Enter a number. Round your answer to two decimal places.) z = Sketch the area described. (Select the correct graph.) This is a graph of a standard normal distribution with z to the left of zero. The area under the curve to the right of z is shaded. This is a graph of a standard normal distribution with z to the right of zero. The area under the curve to the right of z is shaded. This is a graph of a standard normal distribution with z to the left of zero. The area under the curve to the left of z is shaded. This is a graph of a standard normal distribution with z to the right of zero. The area under the curve to the left of z is shaded