Read, read again, and then re-read the problem if it is giving you a headache.
A. They give you all the information you need. You are told that a process (who cares what the process is, basically just skip the entire first sentence of this question - they are trying to overload you with information to see if you can actual comprehend what is being asked on a fundemental level) is fine if it produces results that are within 10C's of 1200. Thus random variables ranging from 1190 to 1210 will be considered successful. The question that want to know with what percentage will the process produce good results. Well obviously it will produce good results if the values of your samples run between 1190 and 1210. You then, using Z-scores (I assume the distribution of temperatures are normal since the process technically has an infinite population), find the area bounded between 1190 and 1210.
B. Is fine.