From the z-table:

(a) This is the same as asking "What is the area to the right of 1.06 under the standard normal curve?"

We need to take the whole of the right hand side (area 0.5) and subtract the area from z = 0 to z = 1.06, which we get from the z-table.

(b) This is the same as asking "What is the area to the left of -2.15 under the standard normal curve?"

This time, we need to take the area of the whole left side (0.5) and subtract the area from z = 0 to z = 2.15 (which is actually on the right side, but the z-table is assuming it is the right hand side.)

(c) This is the same as asking "What is the area between 1.06 and 4.00 under the standard normal curve?"

(d) This is the same as asking "What is the area between -1.06 and 4.00 under the standard normal curve?"

We find the area on the left side from z = -1.06 to z = 0 (which is the same as z = 0 to z = 1.06), then add the area between z = 0 to z = 1.04 (on the right side):