We were given a problem today where Z is a standard normal random variable and we had to calculate: P(Z<6.0) and P(Z>6.0) The Z Table (https://www.ztable.net) I have been using only has max values till 4. What do I do?

Note that p(z<4) is very close to 1, just 2/100,000 away. Hence p(z<6) is incredibly close to 1, probably closer than 1/10,000,000 and so for all practical purposes is equal to 1.