PIC16F72 does not have an internal EEPROM where you can store data as in 16F84A, so you will be unable to save data if you use a 16F72 (unless you use an external memory...).
16F84A microcontroller has an internal EEPROM that can be used to write/read data using the CCS functions "write_eeprom" and "read_eeprom". As PIC16F72 has no place to store data, these CCS functions will do nothing...