The value of X which is exceeded 90 of the time in the duration of measurement is ........

Miscellaneous Others

Question based on the following data :
Measurements of some variable X were made at an interval of 1 minute from 10 A.M. to 10:20 A.M. The data, thus, obtained is as follows :
X : 60, 62, 65, 64, 63, 61, 66, 65, 70, 68
63, 62, 64, 69, 65, 64, 66, 67, 66, 64

The value of X, which is exceeded 90% of the time in the duration of measurement, is