Vim copies the line above the cursor?

  question, vim

Assume that the cursor is on line 10 in normal mode.
5yy will copy the following 5 lines of cursor, namely lines 10, 11, 12, 13 and 14.

How to copy the above 5 lines of cursor, i.e. lines 10, 9, 8, 7 and 6?
Can I finish in normal mode without switching to ex mode?

yNkBeforeNLine