You want to search for Z-scores to learn about this one. I'm looking into the other ones.
I match your first answer for 0.0049, go here:
Probability of a Random Variable in the Normal Distribution
Press Probability Greater than, and enter 2.58, Press Calculate. It will show you the math.
The general consensus for Z-scores is people grab values from a pre-approved table and go from there.
2nd question I quoted, answer is d, use the same link. this time, use the Probability between button, 2 values come from your question, 0 and 0.92
If P(z>c)=0.2358 (c is positive), find c?
Answer is D. Same link I provided
For the other questions, I think it's a similar concept, however I'm not sure if it's the same distribution. I think you have enough to get started, let me know if you have questions.