Proximity Zone RSSI Value

I want to know what is the RSSI value of proximityzone Immediate, near and far

You already gave nearable zone values Immediate >-85 and near is >-85 to<-95 and far is <-95 in sdk.

could u tell me the rssi value of proximity beacon.

There are no fixed RSSI thresholds for these, because that depends on the Tx Power with which the beacon broadcasts.

Just curious, what do you need this data for?