Antimicrobial x targets a specific protein in the cytoplasm of the bacterial cell, causing the bacteria to stop growing, but does not kill them. a few bacteria start to grow in the presence of antibiotic x. analysis of the bacteria that can now grow shows that they have changed the shape of the target for antimicrobial x. what conclusion can be made?

The answer to this question would be: Antimicrobial X is less effective against the new shape of its target.

In this question, the antimicrobial X targets a specific protein in the cytoplasm of the bacterial cell and the bacteria have changed the shape of the target for antimicrobial x. The changed shape of the antimicrobial X will cause it to stop working as it can bind to the specific protein in the bacteria cell anymore. 
Because some of the drug(that the shape changed) is losing its function, the effect of antimicrobial X will be reduced.