Arduino Micro as ISP and atTiny84A

Or...

Micro pin 8 (SS) to ATtiny Reset Pin
Micro pin 9 (SCK) to ATtiny SCK
Micro pin 10 (MOSI) to ATtiny MOSI
Micro pin 11 (MISO) to ATtiny MISO

Nice catch Coding Badly, I keep thinking of the mini when I see micro.