Getting back real values from normalised data

I have normalised some data and then carried out some cluster analysis using R. I now have the means of my clusters but these are in normalised values, I want to know can anybody help me to get these back to more interpretable values.

To normalise my data I used:

Y= (mydata$EnergyUse-mean(mydata$EnergyUse))/sd(mydata$EnergyUse)

I then crried out my cluster analysis in r which returned my means as

Cluster CerealYield EnergyUse   CO2emissions    Temp    Precip  GDP
1   -0.73229499 -0.07829494 -1.767688   0.6356602   -0.3912229  -0.2847595
2   0.61525405  0.70369815  0.5436982   0.3620775   -0.6825516  -0.2200229
3   0.04098394  -0.51104798 -0.1160361  -1.3587098  -0.255205   0.5526377
4    0.19082061 0.0798314   -0.1787448  0.7283415   1.4880912   -0.1926523

how do I make these values more interpretable?