How Glucose is a molecule that can move across the cell membrane if the concentration of glucose is higher outside the cell then what will happen by the process of diffusion?

It depends if the existing fluid inside the cell membrane can pass through the cell wall also. If not, then the fructose concentrations will balance out through diffusion, but the inner fluid quantity wont change, so the cell will expand/become turgid. If existing inner fluid of the cell is free to pass through the membrane, then the fructose concentrations will balance out, but the cell may not become turgid....

Fructose molecules will diffuse into the cell.
The cell will experience a hypotonic condition which means water will move out of the cell to maintain an equilibrium or isotonic condition in which the solute concentration in the cell in equal with the outer enviroment.