A distribution of 50 scores with a mean of -4 and a standard deviation of 5. Can have at most how many of these scores greater than 6?

I know the following...

n = 50

mean = -4

std dev = 5

I'm thinking with a mean of -4 the std distribution doesn't meet the requirements of Markov's inequality theorem of no negative values. Therefore scores of 6 based on the Chebyshev theorem are (6-(-4))5 = 2 std deviations form the mean. Not sure where to go from here?