MOVLW 067 : Move the literal 067 into the working register
MOVWF 10  : Move the working register to file 10 ( GP file in the '84)
DECFSZ 10 : Decrement the contents of file 10 and skip the next inst if the
          : zero flag is set by the decrement

To be correct the DECFSZ instruction should include the destination of the r
result:

DECFSZ   10,W
   or
DECFSZ   10,f

It defaults to f but.... (now, now Andy)

Happy bit fiddling,
Brian