Question 1155928
z=(x-mean)/sd

sd is sqrt (variance) =sqrt (0.6)=0.7746

over 10 is a z> (10-7.6)/0.7746=+3.10
fewer than 8 is <(8-7.6)/0.7746=0.52
from the table or calculator 2VARS 2(normalcdf) use (3.1, 6) the 6 is large enough to be infinite.
and then get (-6,0.52) for the lower end and add the probabilities 

0.0010+0.6985=0.6995

You can go to the z -table and look at the bold on the left for 3.1 and then the column for "0", with is 3.10, and the intersection of the row with 3.1 and the column with "0" has a four digit number.  You want everything to the right of that up to 1.  Do the same for the other, only now the number read is what you want, since it is probability from negative infinity