He miraculously managed to survive the wreak, and sent out a distress signal, saying "I'm high up, across the street from the number "6984." If you find this number, this should help you find Zorg; help find Zorg before Spaceman Spiff does; otherwise he'll end up a stinking pile of goo...literally!
Good luck!
Other Spaceman Spiff and Zorg Adventures:
Zorg's Bust Stop Mystery