just one listing for John in the directories I have, but there is an additional address :
There's no sign of John in 1872 trade index, the street listing for the Coombe address is as follows : 
1872 - 79 Coombe, John Marony - grocer & spirit dealer
  also at 1 Brabazon St  (same listing there)
1868 - 79 Coombe, John Johnson - grocer & spirit dealer
  also at 1 Brabazon St  (same listing there)
  (also in the trade's index)
1863 - 79 Coombe - Teresa Keegan - grocer & spirit dealer
   1 Brabazon St - Teresa Keegan - grocer & spirit dealer
Brabazon street is off the Coombe. No 79 seems to be a block or two away from the junction of the two streets. 
Shane