Sir Geoff, hat-trick hero in England's 1966 World Cup victory, and who hails from the area, was the guest of honour at the event, where Makro showed the world the fruits of a £5m investment in refitting the store.
Improvements include an increase in the number of fresh meat and fish products available, including the introduction of a cut-and-collect butchery service.
Specialists in meat, fish and wine have been employed to give customers one-to-one knowledge and information.
The Rayleigh store is the second of 33 Makro UK stores to be refitted.
The first was in Charlton, a year ago this week.