The capacitive and inductive reactances are equivalent at resonance. The inductive reactance will be stronger than the capacitive reactance above the resonance frequency. As a result, an RLC circuit that operates above its resonance frequency acts as a purely inductive circuit. In this circuit, the phase difference between current and voltage will be the same as in the inductive circuit.
Capacitive reactance is given by XC = 1/wC
Inductive reactance is given by XL = wL
At resonance, XL = XC
⟹ wL= 1/wC
But a frequency higher than resonance frequency, XL > XC
Like a result, at a frequency greater than the resonant frequency, the circuit behaves as an inductive circuit, with the current lagging behind the voltage.