Whether you're talking about humanity, or an individual, the common and natural expression of this question that your teacher is grasping for is:
Where do you see us in five years?
Where do you see humanity in 5 years?
For an individual:
Where do you see yourself in five years?
This the common way of simply posing the question of what an audience predicts the future state of something to be. So if your teacher is referring to humanity, give him your opinion on what you think the state of our species will be in the next 5 years. For example:
Question: Where do you see us in five years?
Answer: Right in the middle of world war three.
Question: Where do you see yourself in five years?
Answer: Hopefully retired and sipping some fruity alcoholic beverage
with an umbrella in it on a sunny, sandy beach.
As a side note, this is an excellent question. The reason is that this expression is very common and understanding it is important. This is a common interview question when seeking a job and will almost certainly be phrased exactly as a describe here, so understanding it is important.