5.8% isn't bad at all as long as inflation rate is brought down under 3.
5.8 percent growth is quite good regardless of any inflation figure.
It seems that you are mistaking real growth with nominal growth. Pakistan's 5.8 percent is real growth. Nominal growth would be growth due to inflation plus real growth. For instance:
If inflation is 10 percent and real growth is 5.8 percent than nominal growth would be 16.4 percent.
If inflation is 3 percent and real growth is 5.8 percent than nominal growth would be 8.95 percent.