How are you measuring perfomance?
If you're using column F for performance, the bottom decile can be calculated using
=PERCENTILE.EXC($F$2:$F$32,0.1)
or
=PERCENTILE.INC($F$2:$F$32,0.1)
The number of values below this value will be 3 or 4 products depending on which version (INC or EXC) you've used.
For those values falling in the bottom decile I'm not clear what values (column) you might want to substitute and how your median level (of what?) is calculated.