∵P(μ-2σ<X<μ+2σ)=0.92,P(μ-σ<X<μ+σ)=0.68,μ=3,σ=2∴P(-1<X<7)=0.92,P(1<X<5)=0.68,∴P(5<X<7)= 1 2 [P(-1<X<7)-P(1<X<5)]= 1 2 (0.92-0.68)=0.12故答案为:0.12