local HitBox = Content:WaitForChild('Box'):Clone() --Get HitBox Part From Folder
HitBox.Parent = workspace
HitBox.Position = Character:WaitForChild("HumanoidRootPart").CFrame.lookVector * Vector3.new(0,0,-6)
game:GetService("Debris"):AddItem(HitBox, .75)
Have you tried using CFrame angles?
Example
CFrame.new(Vector3.new(Box.CFrame.X,Box.CFrame.Y,Box.CFrame.Y)) * CFrame.Angles(0,0,-6)
Try change this part :
HitBox.Position = Character:WaitForChild("HumanoidRootPart").CFrame.lookVector * Vector3.new(0,0,-6)
To this :
HitBox.Position = Character:WaitForChild("HumanoidRootPart").CFrame.lookVector * 6